A body moves from a position 𝒓𝟏= (2𝒊Ė‚-3ðĢĖ‚-4ðĪĖ‚ ) m to a position, r2= (3𝑖Ė‚-43jĖ‚-5𝑘Ė‚) m under the influence of a constant force F= (4𝒊Ė‚− 4ðĢĖ‚+ 5ðĪĖ‚ ) N. The work done by the force is

Question: A body moves from a position 𝒓𝟏= (2𝒊Ė‚-3ðĢĖ‚-4ðĪĖ‚ ) m to a position, r2= (3𝑖Ė‚-43jĖ‚-5𝑘Ė‚) m under the influence of a constant force F= (4𝒊Ė‚− 4ðĢĖ‚+ 5ðĪĖ‚ ) N. The work done by the force is

(A) 57 J

(B) 58 J

(C) 59 J

(D) 60 J

Answer: Option (A)

Solution:

A body moves from a position 𝒓𝟏= (2𝒊Ė‚-3ðĢĖ‚-4ðĪĖ‚ ) m to a position, r2= (3𝑖Ė‚-43jĖ‚-5𝑘Ė‚) m under the influence of a constant force F= (4𝒊Ė‚− 4ðĢĖ‚+ 5ðĪĖ‚ ) N. The work done by the force is
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